There is a scene where the main character of the film Johnny 5 (robot) is violently attacked with a crowbar and axe. Johnny 5 expresses pain and pleads for its life. The robot spurts and leaks a blood like substance throughout the remainder of the film. The robot does eventually bleed to death during the final scene, but is rescued by its creator Ben Jaharvi (Fisher Stevens).
Younger viewers particually small children will find the attack on Johnny 5 and the aftermath upsetting and rather distressing.
The above scene is very intense, daunting and quite upsetting.